| NWS Forecast for: St. Charles County Issued by: National Weather Service Saint Louis, MO Last Update: 127 AM CDT Tue Sep 22 2026 |  |
| Rest Of Tonight: Mostly cloudy with a slight chance of very light drizzle. Near steady temperature in the mid 60s. Northeast winds 5 to 10 mph. Tuesday: Mostly cloudy. A slight chance of very light drizzle in the morning. Highs in the lower 70s. Northeast winds 5 to 10 mph. Tuesday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph. Wednesday: Partly sunny. Highs in the lower 70s. North winds 5 to 10 mph. Wednesday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph. Thursday Through Friday: Partly cloudy. Highs in the upper 70s. Lows in the upper 50s. Friday Night: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s. Saturday: Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the mid 70s. Chance of rain 20 percent. Saturday Night: Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 50s. Chance of rain 20 percent. Sunday: Partly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent. Sunday Night And Monday: Partly cloudy. Lows in the upper 50s. Highs in the upper 80s. | |
| Zone Forecast: St. Charles County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |